Water head



' sept'. 29, 1.925.

L. c. BAYLES WATERHEAD Filed Apr-11 s. 1924 lllll IIIIIIIII Q 1, FMWMI un..

. .Q, .l Illlll U .5E-.ris Ezine?! x Patented Sept. 29, 1925,

NUNITED STATES PATENT OFFICE.

LEXVIS C. BAYLES, OF EASTON, PENNSYLVANIA, ASSIGNOR T INGERSLL-RAND COM- PANY, OF `J'l'llREaEY CITY, NEW JERSEY, A CORPORATION 0F NEW JERSEY.

WATER HEAD.

\ Application led April 3,

To all whom z'tmayconcern:

-Be it known that I, LnwrsvC. BAYLns, a citizen ofthe United States, and a resident of Easton, county of Northampton, State ot Pennsylvania, have invented a certain l/ Vater Head,`.of which the following is a i speciiication, accompanied by drawings.

This invention relates to rock drills of the hammer type, but y more particularly to a water head for stope drills in which cleans-` i ing liquid is introduced into the hollow drill steel through the anvil block. Roel; drills g are used, in which the water, which is ordinarily usedfor cleansing purposes, contains acidswhich are injurious to the Yoperative parts ofthe drills and which have a tendency in other waysto Aeffect their efficient .l operation. It is therefore lnecessary inthese places to introducewater into the drill steel through the front endparts of the machine, usually through :the anvil block. In view of the 'fact that it is practically impossible topack the anvilblock in order to prevent the escape. of liquid between the anvil block and drill steel, water collects in front of the anvil block and forms a cushion, which materially effects efficient drilling.

" In accordance with the present invention, a chamber having expansible or resilient walls,'is located in the frontv head, so that as the anvil block anddrill` steel are ad-` vanced and :torce the water in a radial direction, the resilient or `expansible walls will give away and thereby'eliminate the liquid cushion. Thisinvention is particularly ap` plicable to stope drills where there is a tendency for the .cleansingfliquid to run down the drill steel and enter the operative parts of the machine, and by means of this in# vention, the liquid which is bound to collect in front of the anvil block, does not in any way reduce the drilling.`

` The objectsof `the presentinvention are 1924. serial No, 704,010.

' to prevent the creation of a liquid cushion in a rock drill between the anvil block and the front head; y

Another object of the invention is to maintain a constantA clearance volume in the chamber into which the drill steel and anvil block extend, when the anvil block and steel are advanced by the percussive blows oi the hammer piston. i y

Further objects of the inventionwill hereinafter appear and the invention is, shown inone of its preferred forms in the accom` panying drawings,A in which- Figure 1 is a vertical. sectional view of the. forward end of astope drill embodying the present invention,

Figure L2 is a view similar to yFigure 1, with the drilll turned at right angles and showing the Voperation of vthe expansible chamber Vas the anvilbloclrand the steel are advanced, and

Figure `3 is a perspective view of the resilient annular ring.

Referring to the drawings, designates the cylinder of a fluid actuated stope drill, whichis separated fromv the fronthead B .by a vfront cylinder bushing C. y The cylin` derA, front" cylinder bushing C and. front head B are connected together bythe usual spring pressed side bolts D and the hollow drill steelA E is adapted to extendinto the front head B for receiving the impact blows of` the fluid actuated .hammerv biston F through the medium of the anvil block G. In this instance, a renewable bushing H is located in the forward end ofthe front head B and is held in place by a suitable pin or key f f In accordance with the'` present invention, the front head Bis formed with an annular chamber K adjacent its rearward end, and the drill steel E is adapted to extend a slight distance into the forward end of thev chamber K. In thisinstance, the anvil block G isformed with a passageL, which is adapted to communicate with the passage in the hollow drill steel and in order to supply y a bushing Q is located in the passage O and is preferably held in place against the anvil block G by a coil spring R which bears against a washer S. In this manner, the bushing Q is held against the anvil block G to enable cleansing liquid from the inlet connection P to pass through the bushing Q and into the passage L in the anvil block and thence into the hollow drillsteel E. Flattened portions T are preferably formed on the neck U of the anvil block G in order to prevent the anvil block from turning, so that the passage L will at all times register with the sleeve or bushing Q. In this instance, a counter bore Vl is preferably formed in the bushing C adjacent one end of the neck U of the anvil block, to enable the anvil block to seat as tightly as possible in the bore of the bushing C. It is to be understood that cleansing liquid may be introduced into the anvil block Gr by any suitable `means, and only one means is shown on the Vdrawing for illustrative purposes, and it is not desired to limit this invention to the particular means shown, for supplying liquid to the anvil block.

In this instance, an annular groove W surrounds the bushing Q and preferably communicates with an atmospheric vent X by means of a port Y, and an annular groove Z preferably surrounds the anvil block. G and also communicates with the atmospheric vent X. In this manner, any liquid which escapes between the anvil block G and the bushing C and from between the bushing Q and the bushing C, will pass to atmosphere through the vent X and will not interfere with the efficient operation of the anvil block G.

In view of the fact that it is practically impossible to maintain afluid tight connection between the head of the anvil block G and the drill steel E, because of the constant relative movement between the vdrill steel and the anvil block, a portion of the cleansing liquid will collect in the chamber K. '.If no means are provided for maintaining a constant clearance volume in the chamber K, as the anvil block and steel are advanced by means of the hammer piston F, a liquid cushion will be created in the chamber K and efficient drilling will be impaired.

Therefore, in order to maintain a constant clearance volume in the chamber'K, astthe anvil block Gr and steel E are advanced, a resilient ring a is located in the chamber K and forms a resilient annular wall for the chamber K. The ring ai, which may be of rubber or other suitable material, comprises the body portion Z) and external annular anges c and d. IVhen the anvil block G ands'teel E are advanced, the liquid in the chamber K will be displaced radially as indicated in Figure 2, without being discharged from the front head B. An atmospheric vent e in the front head B enables atmospheric pressure to be maintained against the body portion b of the ring a.

By providing the recess K with a resilient or expansible wall, thefdanger of the liquid cushion in the chamber is obviated and eiiicient drilling may be obtained.

I claim.:

l. In a head for rock drills for feeding cleansing fluid to the drilled hole, an eX- pansible wat-er chamber, a drill steel extending into one end of the chamber, and an anvil block extending into 'the other end of said chamber.

2. A head for rock drills for feeding cleansing fluid to the drilled hole, said head having an expansible chamber into which liquid is introduced and adapted to permit the displacement of a portion of said liquid Without discharging said liquid from the head, a drill steel extending into one end of the chamber, and an anvil block extending into the other end of said chamber.

f 3. A head for rock drills for feeding cleansingk iiuid to the drilled hole, said head having an expansible chamberI into which liquid is introduced, and adapted to maintain a substantially constant clearance. volume therein, a drill steel extending into the forward end of said chamber, and an anvil block to reciprocatefwithin said chamber for delivering blows against the drill steel.

4. In a front head for rock drills, a chami ,chamber may remain substantially constant when the anvil block and drill steel are moved forwardly in the chamber.

5. In a rock drill of the hammer type I the combination of a front head having a chamber, a front cylinder bushing, a hollow drill steel adapted to extend into the forward end of said chamber, an anvil block having ahead of larger lcross sectional area than the said drill steel located in said bushing and extending into the rearward end of said chamber, means for supplying cleansing liquid through said anvil block to said drill steel and means in said front head for permittno' the dis lacement of a portion of the liqui in sai chamber in frontk of said anvil block without dischargingsaid liquid from the front head.

6. In a rock drill of the hammer type, the combination of a fronthead havinga chamber, a front cylinder bushing, a hollow drill steel adapted to extend into the forward end of said chamber, an anvil block having a head of larger cross sectional area than said drill steel located in said bushf and extending into the rearward end of said chamber, means for supplying cleansing liquid through said anvil block to said drill steel, and resilient means for maintaining a constant clearance volume in said chamber when said anvil block and steel are advanced.

8. In a rock drill of the hammer type, the combination of a front head having a chamber, a front cylinder bushing, a hollow drill steel adapted to extend into the Jforward end of said chamber, an anvil block having a head of larger cross sectional area than said drill steel located in said bushing and extending into the rearward end of said chamber, means for supplying cleansing liquid through said anvil block to said drill steel, and a resilient ring in said chamber for maintaining a constant clearance volume in said chamber when said anvil block and steel are advanced.

9, In a rock drill of the hammer type, the combination of a front head having a chamber, a front cylinder bushing, a hollow drill steel adapted to extend into the forward end of said chamber, an anvil block having a head of larger cross sectional area than said drill steel located in said bushing for supplying cleansing liquid through said anvil block to said drill steel, and an expansible Wall for said chamber for maintaining a constant clearance volume in said chamber' when said anvil yblock and steel are advanced.

10. In a rock drill of the hammertype, the combination of a front head having a chamber, a front cylinder bushing, a hollow drill steel adapted to extend into the forward end of said chamber, an anvil block having a head of larger cross sectional area than said drill steel located in said bushing and extending into the rearward end of said chamber, means for supplying cleansing liquid through said anvil kblock to said drill steel, and a renewable expansible annular ring for said chamber for maintaining a constant clearance volume in said chamber when said anvil block and steel are advanced.

In testimony whereof I have signed this specication.

LEWIS C. BAYLES. 

